Prometheus Research Library

The International Communist League (Fourth Internationalist), earlier known as the International Spartacist tendency is a Trotskyist international. Its largest constituent party is the Spartacist League (US). There are smaller sections of the ICL (FI) in Mexico, Canada, France, Germany, Ireland, Italy, Japan, South Africa, Australia, Greece, Poland and the United Kingdom.

The group originated within the Revolutionary Tendency of the Socialist Workers Party and, upon its expulsion from the SWP, it named itself Spartacist in 1964 in homage to the original Spartacist League in World War I Germany, co-led by Rosa Luxemburg and Karl Liebknecht.

The central theoretical journal of the ICL(FI) is Spartacist which is published in four languages approximately once a year. Apart from the above the ICL(FI)'s American section, the Spartacist League, operates the Prometheus Research Library in New York City. The library has published a number of bulletins and books and houses the tendency's archives and other material on the history of Trotskyism.

In addition to Spartacist the national sections of the ICL(FI) each publish a regular paper of varying regularity. For example, the U.S. group publishes the newspaper Workers Vanguard, which is known for its running commentary on the activities of other leftist groups, its sarcastic wit, and its obituaries of leftist figures whose lives often are inadequately analyzed and/or memorialized in the mainstream media, recently including Bill Epton, Richard Fraser, Robert F. Williams, and Myra Tanner Weiss. Since the 1990s Workers Vanguard has also featured original essays on the history of Marxist and pre-Marxist radical ideas written by long-time member Mark Tishman under the name Joseph Seymour. From time to time Workers Vanguard also carries features under the rubrics Women and Revolution and Young Spartacus, these being the titles of once separate publications since discontinued.

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